I suspect that this photo has been circulating on the web for a while when it finally made it to my inbox. The challenge before us is to spot the cat in the photo. Yes, this is meant to develop a little frustration in you, but it isn't a fool's errand. There really is a cat in this photo. You need to find it.
I recall a documentary on television on how the American army was working hard on invisibility. If the enemy can't see you, then you have a definite, if not decisive, advantage. But the American army's concept of invisibility doesn't entail an actual disappearance from the scene. Their concept involved blending into the background so well that invisibility is achieved. They do this by electronically mapping the background against which a sniper is positioned and then projecting the same patterns on the front of the sniper's gear---rendering him indistinguishable from the background. Invisibility!
Good luck spotting the cat. Click on the photo to enlarge it.